UBUNTU-CVE-2026-107183

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Source
https://ubuntu.com/security/CVE-2026-107183
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107183.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-107183
Upstream
Published
2026-10-08T00:00:00Z
Modified
2026-10-08T19:47:03Z
Severity
  • 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
  • 9.2 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

llama.cpp before b11393 contains a use-after-free and double free vulnerability in common_chat_peg_mapper::map that allows unauthenticated remote attackers to corrupt heap memory via a dangling current_tool pointer. Attackers can submit a chat_parser in a POST /completion request emitting a tool-id after a tool-close tag to crash llama-server and shape a heap write primitive.

References

Affected packages

Ubuntu:26.04:LTS / llama.cpp

Package

Name
llama.cpp
Purl
pkg:deb/ubuntu/llama.cpp?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

Other
5882+dfsg-2
8064+dfsg-1ubuntu1
8681+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "libllama0",
            "binary_version": "8681+dfsg-1"
        },
        {
            "binary_name": "llama.cpp",
            "binary_version": "8681+dfsg-1"
        },
        {
            "binary_name": "llama.cpp-examples",
            "binary_version": "8681+dfsg-1"
        },
        {
            "binary_name": "llama.cpp-tests",
            "binary_version": "8681+dfsg-1"
        },
        {
            "binary_name": "llama.cpp-tools",
            "binary_version": "8681+dfsg-1"
        },
        {
            "binary_name": "llama.cpp-tools-extra",
            "binary_version": "8681+dfsg-1"
        },
        {
            "binary_name": "python3-gguf",
            "binary_version": "8681+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-107183.json"